Roller bearing equipped with a fluid tight passage device.

摘要

The rolling-contact bearing comprises a rotating race and a non-rotating race through each of which pass ducts (6, 7) for the passage of fluid, rolling bodies (3) between the rotating and non-rotating races, and a seal device (8) mounted between the rotating and non-rotating races in order to form a sealed intermediate chamber (14) communicating with the fluid passage ducts (6, 7). The intermediate chamber has two flexible walls (11), the free end parts of which form two sealing lips (12) in rubbing contact with a bearing surface (13) of one of the races (2) of the bearing. The bearing surfaces (13) with rubbing contact are inclined with respect to the axis (XX') of rotation of the bearing. The flexible walls (11) extend substantially parallel to the said bearing surfaces so that the contact pressure between the sealing lips and the bearing surfaces varies in the same direction as the pressure of the fluid in the intermediate chamber (14) of the seal device.